A student has died after he was stabbed in what police believe was a robbery in south-east London.
Samuel Guidera, 24, a student of history and politics at the University of Greenwich, was found at Bailey Place in Sydenham at 2155 GMT on Saturday.
A police spokesman said Mr Guidera, who was studying to be a teacher, was carrying a pink T-mobile carrier bag when he was attacked.
In a police statement Mr Gudiera's family said they were devastated.
"Samuel was a hard-working man, who was passionate about his studies. He was also very family orientated," they added.
"We are devastated and cannot understand why this has happened. We would appeal to anyone who has information about our son to contact the police."
Police said Mr Guidera was found collapsed 200m (656ft) from Penge East train station, in south east London. He was taken to hospital suffering from a stab wound but pronounced dead at 2255 GMT.
Det Ch Insp John McFarlane, of the Metropolitan Police, said Mr Guidera travelled on the 2117 GMT train from Bickley to Penge East.
He added: "We are keen to speak with anyone who remembers seeing him either on the train or getting off just after 2130 GMT.
"Mr Guidera, who was carrying a pink T-mobile carrier bag, crossed over the footbridge towards Newlands Park, en route to meet a friend, when we believe he was attacked.
"We are considering a number of possibilities, but believe this may have been a robbery. There would have been a number of people in the area and we are keen to speak with them."
A post-mortem examination will be held.